tolong dijawab yah besok mau dikumpul mkasih

1a. dik p
v = 5 m/s
m = 400 g = 0.9
g =9.8
b. ek = 1/2 mv^2
1/2× 0.4 (5m/s) ^2= 5 j
syarat em kita harus mengetahui ep
mp = m x g x h
0.4 kg x 9.8. 5 = 19.6 j
jadi jawab a
a) em = ek + ep
em = 5 j + 19.6 j
em = 24.6 j